284 Mr. W. H. BenSoti' hn someiteu) /?«??<«« €yclostc(mat4. 



desci'iptions of which were silent in regard to this character*. 

 The figures in Sowerby's ' Thesaurus ' and in the ' ConchyUen 

 Cabinet ' threw no hght on the subject, but as the figure of 

 A. strangulatus in the latter work failed to exhibit the callus, it 

 appeared equally possible that the artist had overlooked the 

 peculiarity in the other species. 



^^ After an examination of the specimens in the British Museum, 

 at my request, with the view of setting this conjecture at rest. 

 Dr. J. E. Gray has obligingly informed me that the sutural 

 callus is also present in the Museum specimens of A. gibbus, 

 but varyiug in size. Dr. Pfeiffer's description of that shell will 

 therefore require to be modified, and instead of " sutura pro- 

 funda simplex," we must record " sutura profunda, eallum retro- 

 versum magnitudinis variabilis gerens ;" and to the generic cha- 

 racter a similar addition must be made. 



The following description of the animal was drawn up by me 

 at Landour in 1842, from specimens of Cyclostoma strangula- 

 tum, Hutton. 



Alyc^us, Gray. 



Tentaoula duo mediccria, cylindracea, apicibus obtusis, oculos ad 

 basin posteriorem ipsa gerentia ; oculi integri, circulares, nigri 

 miuuti (quasi puncta), \ix prominentes. Pes brevis, postice ultra 

 testam non transiens, operculum testaceum concaTiusculum mul- 

 tispiratum, sursum ad dextram gerens. 



The shell is carried high in the air and clear of the foot, show- 

 ing a strong muscular power in the neck. A moveable orange 

 spot is apparent in the head and which moves down to the snout. 



I once succeeded in passing a hair through the sutural tube 

 or callus into the aperture of the shell. 



1. AlyccEus Urnula, nobis, n. s. 



Testa rimata, vix perforata, globoso-conica, Isevigata, sordide albida, 



, apice obtusiusculo, rubescente, sutura impressa, eallum gerente ; 

 ' . anfractibus 3^ convexis, ultimo ventricoso, exilissime radiato-striato, 

 pone aperturam breviter constrictiusculo, proxime tubam retro- 

 versam, suturalem, elongatam, emittente ; apertura circulari ver- 

 ticali Integra, peristomate incrassato, subduplicato, expanse, sub- 

 reflexo, breviter adnato ; operculo Rperturam sequante, planato, 

 anfractibus mediocribus, subconspicuis. 



Diam. 3^, alt. 4\ mill. 



Bab. ad Darjihng Himalayanum. Teste Dom. R. Trotter. 



This interesting species inhabits the same locality as A. con- 



'■■■■ * Vide for A. strangulatus, Zeitschr. fur Malak. 1846, p. 86, and Conch. 

 Cab. p. l(M, amended Zeitschr. 1861, p. 7 ; and for A. constricfus. Annals, 

 vol. viii. p. 188, and for amended description vol. x. p. 272. 



